MESON Chess Problem Database

Problem Display
PID: 138808 (1K6/8/k4p2/1b6/2N5/3R4/8/5R2 w - - 0 1)

Lincoln, Robert A

2nd Comm., Hirschenson JT, 2010

1K6/8/k4p2/1b6/2N5/3R4/8/5R2

#2

4 + 3

145 StrateGems 2010
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Rb1?
      • 1...Bxc4
        • 2.Ra3#
      • 1...Ba4
        • 2.Rb6#
      • 1...Bc6
        • 2.Rb6#
      • 1...Bd7
        • 2.Rb6#
      • 1...Be8
        • 2.Rb6#
      • 1...f5!
    • 1.Rb3?
      • 1...Bxc4
        • 2.Ra1#
      • 1...Ba4
        • 2.Rb6#
      • 1...Bc6
        • 2.Rb6#
      • 1...Bd7
        • 2.Rb6#
      • 1...Be8
        • 2.Rb6#
      • 1...f5!
    • 1.Rd5?
      • 1...Bxc4
        • 2.Rxf6#
      • 1...Ba4
        • 2.Ra5#
      • 1...Bc6
        • 2.Ra5#
      • 1...Bd7
        • 2.Ra5#
      • 1...Be8
        • 2.Ra5#
      • 1...f5!
  • Keys
    • 1.Rf5!
      • 1...Bxc4
        • 2.Rd6#
      • 1...Ba4
        • 2.Ra5#
      • 1...Bc6
        • 2.Ra5#
      • 1...Bd7
        • 2.Ra5#
      • 1...Be8
        • 2.Ra5#

Anticipated by 109392(1994)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);
      • Vars
        • B(a);N_GUARD,XS(C)::R(B)
        • B(a);OGATE::R1(A)
      • Refutation
        • P(c);
    • Try
      • R(B);
      • Vars
        • B(a);N_GUARD,XS(C)::R(A)
        • B(a);OGATE::R1(B)
      • Refutation
        • P(c);
    • Try
      • R(B);
      • Vars
        • B(a);N_GUARD,XS(C)::R(A),XP(c)
        • B(a);OGATE::R1(B)
      • Refutation
        • P(c);
  • Actual
    • R(A);
    • Vars
      • B(a);N_GUARD,XS(C)::R(B)
      • B(a);OGATE::R1(A)
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